Hybrid - A hybrid air conditioning device takes advantage of a combination of electrical energy and fossil fuels. It's a twin use, in that it can be used to expel scorching air outdoors in the summertime, and from the Wintertime it'll do the opposite to help keep the space heat. https://restaurantandbarventilati75308.blogpostie.com/51737324/the-eco-friendly-commercial-ventilation-diaries